Drain-pipe.



PATENTED NOV. 19, 1907.

B. J. COCHRA N.

DRAIN PIPE.

APPLICATION FILED SEPT. 7, 1907.

M} m Qmwh 96%.

with was L expending sufficiently, break the'pipe along I jection 7, in plan.

clear, and exact description of the invention,

tions embodying nry-iuventionl EDWIN J. COOHRAN, OF STERLING, ILLINOIS.

DRAIDLPiPE.

No. emcee.

Specification of Letters listent. l

Patented Nov. 19, 18

Application filed scptembor '7- ].307'. Serial No. 391.329.

will,

T 0 all whom it may concern: Be it known that i, Emvln' J. COOHRAN, citizen of the Unitedfitetes, residing et Sterling, in the county of Whiteside end Stcte Of illinois; have invented certain new and useful improvements in Drain-Pipes; and I. do declare the following to be e. 'l'ull,

such as will enable others skilled in the art to which it upper sins to inake snd use the some, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form it part of this specification. Y \l J My invention has reference to drain. pipes, and is specially designed for use in the construction of culverts end water-Ways under highways. I In the use of pipe of this kind, the Water running through the some is opt to become frozen in cold weather, and, upon irregular lines, other which the parts will separate, permitting the surrounding earth to get into the pipes, and destroy the usefulness thereof.

In my invention I aim to provide a pipe which will be intact until 'suificient force is exerted upon the hiside to break the same, and, in case the some does become broken, to have the break or breaks occur along predetermined, reguler lines, which will be protected from the entrance of the earth therethrough.

My device possesses other novel features and advantages which will more fully appear in the following specifications, reference. beingdutd, to the accompanying drawings, in which: v-; A

Figure .l is on end view 0{ one of the see-- Fig. .3 is e vertical cross-section through the bod of the pipe." Fig. 3 is u vertical longiturinsl section, through one complete length of pipe, and 3. portion of the adjacent section. Fig. t a. fragmentary detail, showii'ig' the pro- Siiniler parts ure referred to by similar numbers throughout the several figures.

The pipe is formed of a. plurality of sections 1, of the usual form, and provided at one end with an annular rim or flange 2, by means of which a. junction is formed between the ends of the pipe sections. The ipc is preferably constructed of cast meta, and, during the process of manufacture, is provided on its inner face with a. pair of longitudinal grooves 3, midway the bottom and crown of the pipe. Such grooves are preferably triangular in cross-section.

' Extending along each side of 'the pipe, on the outside thereof, is a. downwardly projcoted flange adjacent to the grooves 3, and separated from the wall of the pipe by recesses 5 5. At the ends of the sections, where such ends overdsp to form the joints, the flanges 4 sire.discontinued. The flange 2 is divided into upper and lower halves by moons of narrowslots 6, in line with the grooves I y Extending outwardly from the upper part of the flange 2 is a projection 7, in which is on opening 8, and in the adj scent end of the next section is 'a corresponding perforation 9, which registers with, the opening 8 when.

the ends. of the sections are united. By

means oi" 0. pin or key 10, passed" do'wn-' "weirdly through such perforations the ends of the lengths of pipe are then locked'tzr gether.

in many cases there would not be. suflicient freezin' and consequent expansion to cause a. bros ego of the pipe, and it Would be retained in its original entirety. the inward force becomes suilicint, however, to break the ipe, it is obvious that it will be fractured oiiong, the line of the grooves 3,

end that such breakage will not be interfered with by the Henge 12 by reason of the When slots 6 extending therethrough. The ex pension will not be suliicient to cause the breakage of the pipe until the ice and. freezing water in such 7 ipe has half tilled the some, and upon a mi way oint being reached, the freezing water will fill the roovesB, and the force oi" the expansion will not only be ex ertedngo-inst the walls of the pipe, but against the wells of the grooves to aid in causing a sepnrstionof the psi-ts.

Upon the pipe being fractured, the tendency of the expanding power will be to. force the 11 per edges of the lower half outvrurdly, out such outward movement will be provided for by the ecesses 5. If there were no space between the well of the pi e and such flanges the edges of the pipe wou d be forced tightly against the flanges, and locked against the some, or such flanges would be brokenfrorn the-pipe. After the breaking of the pipe along the line of the groove 3, entrance of dirt or sediment through the break is prevented by the adjoining flange. i

The purpose of the drain pipe is not only to furnish a passage for the water, but also to supply a means for sustaining the earth above such passage, and the locking together of the upper portions of the'lengths of pipe,

as described, aids greatly in maintaining the integrit of the pipe, and preventing settlement 0 the earth above the same. In case there is a tendency of one of the sections tosink, it is held in place by the adjoining .sections. This feature is of special advantage after the breaking of the pipe, if such breakage does take place. of the lowerportions of any of the sections dropping downwardly from any cause, the upper ortions will not sink therewith, the upper ia'lves'of the lengths of pipe forming Ywhat is practically one continuous arch,

which will sustain the earth above the pipe in its ori 'nal condition.

What claim as my invention, and desire to secure bygLetters Patent of the United States, is:. I i

1. A device of the class named, comprising a plurality of pipe sections, provided at alternate ends with annular rims; a pair of longitudinal grooves on the inner side walls of said sections; and a sections,

In the-event tending outwardly from the tions; a pair of longitudinal flangeson the outer walls of said sections, adjacent to said grooves; and means for locking said sections of pipe together, on the u per side thereof,

substantially as shown an set forth.

A drain pipe, comprising a plurality of sections, provided with a pair of longitudinal grooves on the inner side walls thereof; annular flanges on alternate ends of said sections, each of such'flanges being separated into two parts along the line of said grooves,

and a pair of longitudinal flanges on the outer walls of said sections, adjacentto said grooves, and spaced apart-from the wall of the pipe, substantially as shown and described.

4. In a device of the class named, a plurality of pipe sections, each provided on its inner side walls with a pair of longitudinal grooves; annular rims on alternate ends ofsaid'sections, each of such rims being separated along the lines of said grooves. into two parts; longitudinal flanges on the outer walls of said sections, s aced apart therefrom, and adjacent to sai grooves; projections exeach of. said annular rims; a

securing such projections to the end of the next adjacent section of pipe, substantially as shown and for the purpose named.

In testimony whereof, I aflix my signature, in presence of two witnesses. 1

' EDWIN J. GOCHRAN.

' Witnesses: j

I. L. WE'AV'ER, R W. E. MrrcnELL.

upper side of 11 means for; 

